新型预应力碳纤维布加固梁裂缝与刚度分析计算

ANALYZING CRACK AND STIFFNESS OF STRENGTHENING REINFORCED CONCRETE BEAM USING NEW TECHNIQUE PRESTRESSED CARBON FIBER SHEET

在介绍新型"拉锚一体化"预应力碳纤维布张拉与拉锚设备及技术特点的基础上,根据新型预应力碳纤维布加固混凝土梁正常使用阶段的截面受力情况分析,提出了该种梁裂缝的分布及其平均间距和裂缝宽度的主要因素以及影响该梁短期刚度的主要因素。在参照分析无粘结部分预应力混凝土梁的裂缝宽度公式、短期刚度公式的基础上,提出了与规范相对应的一套"拉锚一体化"预应力碳纤维加固混凝土梁的裂缝宽度的计算公式及短期刚度计算公式。与试验结果对比表明,建议计算方法及公式准确度较高。

First of all, This article presents the new equipment which is used in integrative anchoring prestressed carbon fiber sheet and technique characteristic, author presented the mostly complication which influence the beam＇s crack distribution, average space between, crack width and short- term stiffness through analyzing the beam＇s dynamics at up to snuff used state. Then author put forward the count expressions about such beam＇s crack width and average space between which corresponding to the criterion through consulting and analyzing the count expressions about the no felt part prestressed＇s crack width and average space between, such count expressions and count method which comparing to test result are nicety.